* turtle and turtle boss as shell only stand up if nothing is blocking it

* do not cache images without the width and height set in the image settings as there is currently no support to get the old and real image size. the scaled down (cached) image size was used which is wrong

* fixed level sprite manager z position always increases

* renamed jpiranha to flyon

* fixed game over particle animation is not drawn

* fixed time display did recreate the image every frame

* updated credits menu animation

* updated editor gui window handling

* optimize mouse copy function

* update txt file parser and make it more robust

* updated turtle and turtle boss

* added entered number validation for all editor object settings

* savegames now restore the custom level mode

* fixed falling from a halfmassive ground object does not check if other objects now block

* fixed if object or player is moved by another object the ground is not checked